NEW VIBIEMME DOUBLEDOMO OWNERS: Read this before turning unit on! - Page 2

[cannonfodder]

n/m

I need a scace!

Bring your machine to Dayton and I will let you use mine.

[networkcrasher]

Bring your machine to Dayton and I will let you use mine.

Dave, I'd love to, but something tells me the Mrs would wonder why I am packing up my espresso machine and then tell her I'd be out of town for a few days. Might raise some flags!

I might have to get ahold of the boys over at Counter Culture. I know Chris pulled out a Scace the last time I was there for a lab...

[DavidBB]

So, with the VBM double, if I leave the switch in #1 I get espresso only and if I want steam or hot water I need to be in #2. Right? If in #1 and warmed up how long a wait when I switch to #2 until proper steam and water? My PID is currently at 105C and I show 1.5 bar on steam and 10 bar on water.

[Beezer]

No, the first position just allows the boiler to fill without turning on the heating element. You need to switch to the second position to turn on the heating element to make espresso.

From the Domobar Super review:

The last step, filling the boiler, is where you'll first appreciate one of the Vibiemme's unique features: A three-position power switch. This is a feature most often found on commercial equipment. In the first (I) position, the system is powered on but the heating element is not energized. The pump will prime and start filling the boiler. You can also run water through the heat exchanger and group without engaging the heating element. Once the boiler has filled and you have filled the heat exchanger, rotate the switch to its final position (II). Once there, the heater will kick on and the amber 'element energized' light beside the boiler pressure gauge will illuminate.

[networkcrasher]

I noted a post in another thread about the DD that if you just have it in position 1, the brew boiler seems to come on, but the thermosyphon doesn't seem to work as the grouphead temp is VERY low. Always pull with the switch in 2 is what I'm thinking.

[HB]

No, the first position just allows the boiler to fill without turning on the heating element. You need to switch to the second position to turn on the heating element to make espresso.

The Vibiemme DoubleDomo is different: Position 1 enables brewing, the PID controls the brew boiler's heating element. Position 2 enables brewing and the steam boiler.

I noted a post in another thread about the DD that if you just have it in position 1, the brew boiler seems to come on, but the thermosyphon doesn't seem to work as the grouphead temp is VERY low. Always pull with the switch in 2 is what I'm thinking.

Unless more recent production models have changed, the DoubleDomo does not have an HX preheat like the Expobar Brewtus. Turning on the steam boiler will have no effect on the thermosyphon (it will, however, raise the interior temperature ).

[Beezer]

Sorry, my mistake. I assumed that the Doubledomo had the same setup as the HX Domobar Super. That's what I get for jumping to conclusions about a machine I've never used.

[DavidBB]

I've been in position 2 anyway making americano's. I'm wondering if time to brew temp is quicker if left in position 1 when not in use compared to shutting the machine off completely. Thanks for the info. It's been a bit of a leap from my Breville and the instruction booklet is definitely lacking for a complete Noob.

[HB]

I'm wondering if time to brew temp is quicker if left in position 1 when not in use compared to shutting the machine off completely.

I don't follow you. If the power switch is left in position 1, the brew boiler is on and the group is ready to go. Expect to wait a minimum of 25 minutes for stone cold to ready to brew.

[networkcrasher]

Unless more recent production models have changed, the DoubleDomo does not have an HX preheat like the Expobar Brewtus. Turning on the steam boiler will have no effect on the thermosyphon (it will, however, raise the interior temperature ).

All I know is the temp of the grouphead is about 130* when in position 1 according to Erics TC adapter, but when in position 2, it's around 190*.

Not sure what position 2 does, but it's doing something to the group!

[HB]

Not sure what position 2 does, but it's doing something to the group!

You're right, it's purpose is to control the steam boiler, but the steam boiler can have secondary effects. E61 double boiler machines rely on a smaller thermal gradient than their HX cousins. The Vibiemme DoubleDomo has larger diameter tubing on the upper leg of the thermosyphon than the lower leg to encourage circulation. If the steam boiler is off, the effectiveness of this difference is reduced. That said, a flush should very quickly raise the group temperature and end this apparent "thermosyphon stall".

Note this is speculation on my part... Vibiemme is working on the next production run as we speak with feedback from early adopters. What is reported by today's owners may not be true one month from now. From what I understand, our evaluation models will come from the next production run.

[networkcrasher]

You're right, it's purpose is to control the steam boiler, but the steam boiler can have secondary effects. E61 double boiler machines rely on a smaller thermal gradient than their HX cousins. The Vibiemme DoubleDomo has larger diameter tubing on the upper leg of the thermosyphon than the lower leg to encourage circulation. If the steam boiler is off, the effectiveness of this difference is reduced. That said, a flush should very quickly raise the group temperature and end this apparent "thermosyphon stall".

Note this is speculation on my part... Vibiemme is working on the next production run as we speak with feedback from early adopters. What is reported by today's owners may not be true one month from now. From what I understand, our evaluation models will come from the next production run.

I can confirm the larger diameter tubing encouraging the circulation of the thermosyphon, but as far as a short flush bringing it up to temp, I find that when in position 2, the flush brings it to a bit over 200* in a second or two, while when in position 1, the flush takes about 6 or 7 seconds to bring it up to temp. I hope once the new, larger steam boiler is installed that this is even closer of a flush time while in position 2, as the amount of thermal heat put off by the larger steam boiler should impact the group accordingly.

I would hope that what is reported on the new production run is what our machines will eventually be reporting when they're upgraded to this new v2. VBM and 1st-line have been extremely helpful at getting us early adopters up to speed on what's happening in the background.

Now I just have to keep convincing myself my DD is fine and I don't need a Speedster!

[Jester]

Vibiemme is working on the next production run as we speak with feedback from early adopters. What is reported by today's owners may not be true one month from now. From what I understand, our evaluation models will come from the next production run.

Dan,

So you think the next batch will be here in mid July versus end of June? I'm in that batch as well and trying to figure out when it might arrive.

Thanks...

[HB]

Sorry, I don't know the shipping schedule and there's no assurance ours would be on the same container as yours.

[Marshall]

Sorry, I don't know the shipping schedule and there's no assurance ours would be on the same container as yours.

Probably on the same mule train that's bringing the Dalla Cortes.

[cannonfodder]

Na, they are about to purchase the ground that the trees will be planted on that will eventually grow and be cut down to create the packing crates for the Dalla. However, they have not purchased the land yet and the EPA wants an impact study before the purchase goes through.